A:
Positive:
1 x 130109217 x 185870311 x 118281149 x 26552977 x 168973101 x 128821239 x 54439539 x 24139707 x 184031111 x 117111673 x 77772629 x 4949
Negative:
-1 x -13010921-7 x -1858703-11 x -1182811-49 x -265529-77 x -168973-101 x -128821-239 x -54439-539 x -24139-707 x -18403-1111 x -11711-1673 x -7777-2629 x -4949
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 13,010,921, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 13,010,921 | |
| -1 | -13,010,921 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,010,921.
Example:
1 x 13,010,921 = 13,010,921
and
-1 x -13,010,921 = 13,010,921
Notice both answers equal 13,010,921
With that explanation out of the way, let's continue. Next, we take the number 13,010,921 and divide it by 2:
13,010,921 ÷ 2 = 6,505,460.5
If the quotient is a whole number, then 2 and 6,505,460.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 13,010,921 | |
| -1 | -13,010,921 |
Now, we try dividing 13,010,921 by 3:
13,010,921 ÷ 3 = 4,336,973.6667
If the quotient is a whole number, then 3 and 4,336,973.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 13,010,921 | |
| -1 | -13,010,921 |
Let's try dividing by 4:
13,010,921 ÷ 4 = 3,252,730.25
If the quotient is a whole number, then 4 and 3,252,730.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 13,010,921 | |
| -1 | 13,010,921 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 49 | 77 | 101 | 239 | 539 | 707 | 1,111 | 1,673 | 2,629 | 4,949 | 7,777 | 11,711 | 18,403 | 24,139 | 54,439 | 128,821 | 168,973 | 265,529 | 1,182,811 | 1,858,703 | 13,010,921 |
| -1 | -7 | -11 | -49 | -77 | -101 | -239 | -539 | -707 | -1,111 | -1,673 | -2,629 | -4,949 | -7,777 | -11,711 | -18,403 | -24,139 | -54,439 | -128,821 | -168,973 | -265,529 | -1,182,811 | -1,858,703 | -13,010,921 |
Here are some more numbers to try:
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